Understanding CoS CLI Configuration Statements on PTX Series
Routers

PTX Series Packet Transport Routers have no new Junos
OS CLI configuration statements. However, some statements or statement
options supported on other platforms are not supported or may not
have effect on PTX Series devices. These exceptions are summarized
here.

[edit chassis] Hierarchy Level

The following statement is not applicable to PTX Series Packet
Transport Routers. There are always eight queues available. However,
if there is a requirement to use only four of eight queues, you can
do this by configuring the forwarding class to queue mapping, as appropriate.

[edit chassis fpc slot-number pic pic-number],

max-queues-per-interface (4 | 8);

The following CLI is not applicable to PICs supported on PTX
Series Packet Transport Routers:

[edit chassis fpc slot-number pic pic-number],

q-pic-large-buffer {[large-scale | small-scale]}

On PTX Series Packet Transport Routers, buffer occupancy is
computed as weighted average. However, configuration of weight at
the PIC level is not supported. The default weights are applied.

Note:
Configurations that are supported only on Gigabit Ethernet
IQ PICs, channelized IQ PICs, and so forth are not applicable to PTX
Series Packet Transport Routers. These PICs are not supported on this
platform. Those CLIs are not listed here.